#include <fstream>
#define DIM 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,k,poz,st,dr,mid,v[DIM],x[DIM],l[DIM],sol[DIM],m,lg,ult=2000000000;
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
    for(int i=1;i<=n;i++)
    {
        st=1;
        dr=k;
        poz=k+1;
        while(st<=dr)
        {
            mid=(st+dr)/2;
            if(v[i]>x[mid])
                st=mid+1;
            else
                poz=mid,dr=mid-1;
        }
        x[poz]=v[i];
        l[i]=poz;
        if(poz==k+1)
            k++;
    }
    fout<<k<<'\n';
    int lg=k;
    int i=n;
    while(lg>0)
    {
        if(l[i]==lg && v[i]<ult)
        {
            sol[++m]=v[i];
            lg--;
            ult=v[i];
        }
        i--;
    }
   for(i=m;i>0;i--)
     fout<<sol[i]<<" ";
    return 0;
}